Adding and listing machine



Jan. 18, 1944. P. CROSMAN ADDING AND LISTING MACHINE 7 Sheets-Shet 1Filed July 7, 1943 Jan. 18, 1944. L. P. CROSMAN ADDING Anp LISTINGMACHINE Filed July 7, 1943 '7 Sheets-Sheet 2 Inning Jan. 18, 1944' P.CROSMAN ADDING AND LISTING MACHINE Filed July 7, 1945 7 Sheets-Sheet 5 NENTQR mLaring .dwsmrz J BY I m mm mm mm um mm Jan. 18, 1944. L, RCROSMAN 2,339,321

ADDING AND LISTING MACHINE Filed July 7, 1943 '7 Sheets-Sheet 4 NINVENTOR Loning P050131 Filed July '7, 1943 '7 Sheets-SheetS R O T N E Vm TORNEY Jan. 18, 1944. P. cRosMAN ADDING AND LISTING MACHINE Filed July7, 1945 '7 Sheets-Sheet 6 Jan. 18, 1944. LP. CROSMAN ADDING AND LISTINGMACHINE Filed July '7, 1943 7 Sheets-Sheet '7 I INVENTOR Z op @13 smanQ/ Om Patented 1.... 18, 1944 NITED STATES PATENT OFFICE ADDING ANDLISTING MACHINE Loring Pickering Crosman, South Orange, N. J.,

assignor to Monroe Calculating Machine Company, Orange, N. J., a.corporation of Delaware Application July 7, 1943, Serial No. 493,796

3 Claims.

such statements are prepared upon machines,

having a separate printing head for each column to be printed, makingfor a bulky, power consuming installation, or upon billing machinesprovided with a single printing head, wherein a complete machine cycleis performed in relation to each column, including the setting up of thetype, the printing action and the restoration of the parts to normal.The present invention contemplates the provision of means for arrestingthe differential actuator drive in mid cycle position while initiating asecondary drive adapted.

to operate the type hammers for repeated listings under control of atransversely shiftable platen carriage.

In the contemplated mode of operation, values printed in the left handcolumn during a machine cycle are successively reprinted in a pluralityof columns on the record sheet, the platen carriage being thereafterautomatically returned to itsinitial position and the record sheetautomatically advanced to the next printing line. Following theregistration and printing of a series of items a total may be taken andreprinted in relation to each item column, following which .the recordsheet is automatically ejected and the In the accompanying drawings,illustrating the invention,

. Fig. 1 is a right hand elevation of the machine with the casingremoved and parts broken away.

Fig. 2 is a vertical section taken through the keyboard andthe-registering and printing mech anisms.

Fig. 3 is a detail left side elevationof the negative'total controldevices and of the repeat printing mechanism.

Fig. 4 is a detail of certain ing the motor circuit.

Fig. 5 is a detail rear elevation of the carriage releasing means.

Fig. dis a fragmentary rear elevation of the machine with the carriageremoved and showing certain parts controlling the register settingclutch.

Fig. 7 is a right side elevation of certain control means associatedwith the platen carriage.

parts used for clos- Fig. 8 is a left side elevation of the platen car-,

riage and rear portion of the machine, with the carriage shown in closedor normal operating posltion' Registering, means The adding and listingmachine to which the invention is shown as applied is of well knowntype. It will be suflicient to say that for each denominational orderthe machine is provided with a three-armed differentialv actuator levernumbered SID (Fig. 2), these levers being loosely mounted on a shaft608. The forward arm of each lever BIO terminates in a segmentalregistering rack; the rearward arm has a lister type bar 6 pivotedthereto, and the upper arm has pivotal connection with 'a differentialstop bar 6l5 cooperating with a bank of digit keys 215 to limit themovement of the lever H0.

The digit keys 215 which have been depressed to represent a value arelatched in position with the bottoms of their stems lying in the path ofmovement of the related stop lugs of the bars 6 l 5, allowing such barsto advance a distance proportional to the value of the key, uponoperation of the machine. Depression of a digit key will also remove acolumn latch 2 from the path of movement of its related bar BIS, theselatches preventing movement of a stop bar and lever 6l0 in any column inwhich no key is depressed.

A rock shaft 30! is provided with cam means 3.18 for governing themovement of a spring tensioned rocker frame BIG, mounted on shaft 608,frame GIG carrying a series of dogs 6|! normally engaged by studs of thelevers 610. As shaft 30I is rotated counterclockwise, as seen in Figure1, frame GIG will be rocked, and any of the levers 6") which have beenreleased by the depression of digit keys 215 will be allowed to rotateunder the stems of the keys. Upon reverse or clockwise rotation of shaft3M, the dogs 6|! will return the operated levers SID to normal position.This excursion of the levers 6I0 serves to register amounts set into thekeyboard upon one or more accumulators. and to set up a similar amounton the printing line of the type bars.

Shaft 30I is oscillated by an electric motor 48 connected throughgearing 50 (Fig. 6) and suitable clutch means with a crank arm I55(Fig. 1) from which motion is transmitted, through connecting rod I6I,to a cam 3I6, fast with shaft 3M. As described in the reference patents,disengagement of latch I48 from clutch lever I50, upon depression ofoperating key I38 will allow said lever, under influence of spring I5I,to be rocked out of engagement with the laterally bent end of a springurged pawl I53 pivotally mounted upon the crank arm I55, allowing saidpawl, under influence of its spring, to be rocked into engagement with anotched clutch disk I51, fast to the hub of one of the gears 50 (Fig.6).

Simultaneously with the above described engagement of the clutch, leveri593 will contact a stud I60 fast to a lever ti, and rock said leverdownwardly to cause the insulated roller 83 fast thereto to contact thepoints t l (Fig. 4) of a switch t5 interposed in the motor circuit andinitiate an operating cycle of the machine.

Upon release of key lS-lii latch M3 will return under spring action intolatching position and toward the end of the cycle of operation aprojection SW of crank arm ltd will contact an arm 3' of lever l5ll andwill force said lever back into normal position, engaging the latch,breaking the electric circuit and bringing the end of 7 said lever intothe path of movement of pawl M3 to disengage said pawl from clutch diskit'll.

The positive or negative character of the registrations to be effectedis determined by the following mechanism, fully described in the patentsabove referred to:

The segmental racks of the levers 'filt are designed to operate theaccumulator wheel gears 112 (Fig. 2) of one or more accumulators.

The accumulator shafts tail are slidably mounted in slots of frame plateH8 (Fig. 1) and when one or more of the accumulators are set to activeposition the gears ll? thereof are brought into mesh with the racks ofthe levers Nb, where they are held, against spring tension exerted onshafts can, by rocking cam plate Mil, engaging cams 455 of said shafts.

The cam plate Mil has connection through link 325 with anarm 322 of arocker device 325 provided with two cam followers adjustable by key setcontrol devices to different positions relative to cam arms Sit and 320respectively of rock shaft 3!.

Normally these control devices are set as in Fig. 1 to provide foradditive registration, wherein the accumulator shaft or shafts 403 willbe moved away from the racks of levers 6I0 before said racks are allowedto move, and will be moved to reengage the gears 412 while the racks liein theextreme positions permitted by the keys 2 I5 and stop bars BIS. Asshaft 3III is returned and the racks allowed to rise, the values setinto the keyboard will be additively transferred to the register.

The type bars 6| I are provided each with a row of type, representingthe digits 1 to 9 and zero, the zero type being normally on the printingline. When the levers BIB are moved in accordance with a key setting,the related type bars will be raised to bring the appropriate type tothe print-- ing line. Type hammers H5 are adapted to be operated byspring actuators but are normally held in tensioned position by latches'IOI. When a type bar is lifted a related tripping finger I02 is allowedto move into engagement with the corresponding latch I0 I, and at theend of the counterclockwise rotation of shaft 30I, a frame HI upon whichthe tripping fingers are mounted is moved forwardly, releasing thehammers from those latches which have been engaged by the fingers I02.In order to print zero characters in the lower order places wherein noamount from 1 to 9 has been set up, .the higher order latches 'IUI areprovided with offsets I03, lying in the planes of and designed tov tripthe lower order latches. The hammers are restored and relatched duringthe return rotation of shaft 30I by means of a bail 'IIl'I, operatedthrough a reciprocatory cam I04 fast to a, shaft I64 upon which issecured arm I63 having link connection I62 with the power operated cam3I6.

Near the end of the return stroke of a cycle arm I63 will cooperate witha roller 228 of the keyboard clearout devices to operate rocker 22'! andrelease keys 2I5.

Tabulation The transversely shiftable platcn carriage, whereon therecord sheet is held, is tabulated to bring successive columns of saidsheet into position opposite the type bars, in accordance with thedisclosure of Patent No. 1,946,572.

A tabulating bar l (Figs. 5 and 6) mounted in the platen carriage 5 isprovided with a series of notches i. spaced in accordance with thecolumnar positions of a given form sheet, said bar being adapted byengagement of the wall of a notch with projection t of a lever 'l,supported from the stationary frame of the machine, to secure thecarriage against lateral movement under the influence of a spring drum t(Fig. 8).

Spring drum 8 is mounted upon the left hand casing of the machine andhas suitably secured thereto one end of a tape 9, the other end of whichis secured to the right hand frame of the carriage. Upon disengagementof the projection ii of lever i from the wall of notch 2, as will bedescribed, drum 8 will act to move the carriage toward the right, asviewed in Fig. 5. Lever i is fulcrumed at 99 upon a lever 20, fulcrumedat 2! upon the rear casing of the machine and provided with a stud 23having contact with the walls of an aperture it of the casing to limitthe movement of lever 20.

In starting a series of operations the carriage is shifted to bring theleft hand column into.

printing position, cam surfaces ll of notches 2 ratcheting over surfacei2 of lever "I to permit uninterrupted movement of the carriage.

Disengagement of bar I from projection 6 of lever i will allow saidlever, under 'theinfluence of spring 22, to move toward the left, thusrocking lever 20 to the position indicated by dotted lines in Figure 5.

As the carriage locates in its right hand position, projection 6 oflever I will reengage a corresponding notch 2 of tabulating bar I and,under the influence exerted by spring drum 8, said bar will restore thelevers l and 20 to their normal positions.

Reprint means Fulcrumed upon a transverse rod I00 (Fig. 1) 1s atwo-position lever IDI adapted in the forward setting thereof to adjustmeans for automatically reprinting items and totals as hereinafterdescribed. Operation of lever "II to forward or repeat position willadjust certain mechanisms as follows:

With the reprint lever IOI adjusted for repeat printing and a value setup on the keys 2I5, depression of operating key I38 will initiate amachine cycle by disengagement of lever I50 from pawl I53, permittingengagement of said pawl with notched disk I51 as previously described.

Fulcrumed at I02 is a bell crank lever I03 provided with a laterallyextending projection I04 having engagement with a downwardly extendingarm of the repeat print lever IOI. Adjustment of lever IOI to repeatprint position will,

rock the lower arm thereof toward the rear of the machine, whereuponbell crank lever I03 will be free to rock in a clockwise direction underinfluence of its spring I06, bringing projection I04 of said bell crankinto the path of movement of the lateral projection of clutch pawl I53.As previously described, the printing hammers 1I5 are tripped near theend of the forward stroke of the differential actuating levers.Simultaneously with the release of the printing hammers the projectionof pawl I53 will engage projection I04 of bell crank I03, and said pawlwill be rocked out of engagement with the driving disk I51, bringing themachine to rest at mid cycle position.

As shown in Figs. 2 .and 6, the usual hammer tripping mechanism has beenextended to in clude one additional place to the right of the right handprinting hammer, wherein it will control the operation of a springactuator 100', tensioned by a dummy hammer 1I5. This column will comeunder the control of a pin I01 fast to a rearwardly extending arm of therepeat print lever I As the lever Il'II is'moved to its for- Ward orrepeat print position, pin I01 will be carried upwardly, permitting therelated tripping finger 102 to be moved into active position withrelation to the corresponding latch 10I.

Upon forward movement of frame H I, to release the printing hammersspring actuator 100' will also be'released, a projection I09 of saidactuator lifting a clutch detent IIO, releasing one-cycle clutch I I I.

Clutch III is mounted upon the shaft 5| of the machine operatingreduction gear train 50,

previously described, and operates at approximately twice the speed ofthe machine cycle. Fast to the driven member of clutch I II is a snailcam II 2 (Fig. 3) adapted to engage a roller I I3 fast to an arm H4. Thelower end of arm !I4 is guided by a groove cut in shaft 5I and theuppenen of said arm has pivotal connection I I5 with the hammerrestoring bail 101.

A stud II 6, secured at one end in snail cam I I2 and at its other endin the clutch housing, normally overlies a forwardly extendingprojection II1 of a slide II8 mounted upon the rear casing of themachine, as shown in Figs. 3 and 5.

Slide I I8 is provided with a pawl II9 having a projection overlying thecarriage positioning lever I and upon operation of clutch III stud II6will momentarily displace slide II8 to disengage projection 6 of lever1- from tabulating bar I, whereupon the carriage 5 will be shifted,under influence of spring drum 8, until engagement of projection 0 witha notch 2 corresponding to the next columnar position. In order toinsure prompt release of lever I during this operation, the retractivemovement of lever 20 will move a shoulder'of lever 1 from beneath pawl II9, so that projection 6 will snap back into tensioned engagement withthe flange of bar I. While the carriage is shifting snail cam II2 willengage roller H3 and through arm II4 will rock bail 101 to restore thetype hammers 1 I 5.

In the event the platen carriage completes a shift before the one-cycleclutch I II completes its cycle of operation, roller H3 is released fromthe high point of snail cam H2 and allowed to fall to the low pointthereof to release restoring bail 101 and printing hammers 1I5.

.In order to effect a delayed tripping of the hammers in case theone-cycle clutch completes its operation while the platen carriage isshifting, the following means are provided:

As earlier described, upon release of projection 6 from tabulating bar Ithe stud 23 carried by lever 20 is moved to the position illustrated bythe dotted lines of Fig. 5, remaining in such position untilreengagement of projection 6 with the notch 2 of bar I corresponding tothe next columnar position, whereupon lever 20 and stud 23 will againreturn to normal position. As shown in Fig. 6 stud 23 engages thebifurcated end of a bell crank lever I20 pivotally mounted at I2I uponthe rear casing of the machine. An arm of bell crank lever I 20underlies a rearwardly extending arm I23 of a latch I24 (Fig. 1)fulcrumed upon sub-framing at I25. Normally stud 23, through bell crankI 20, will hold the engaging end of latch I24 forwardly out of the pathof movement of the hooked end I21 of the hammer restoring bail 101.During the operation of the platen carriage, as above described, stud 23will rock bell crank lever I20 in a counterclockwise direction (Fig. 6),allowing latch I24, under in-i fluence of its spring I28, to rock in aclockwise direction (Fig. 1), carrying the engaging end thereof intocooperative relation with hooked end I21 of restoring bail 101. As saidbail is restored by action of snail cam II 2, hook end I21 will engagethe latch', restraining the hammers 1I5 until carriage 5 has completed ashifting operation. Upon completion of the carriage shift, reengagementof projection 6 of the carriage locating lever 1 with the tabulating barI will restore stud 23 to normal position, whereupon said stud,

acting through bell crank I20, will disengage latch I24 from the hammerrestoring bail. The machine operation having been interrupted at midcycle, as previously described, the rocking frame 1II will hold thehammer latches 10I which have been tripped by the active trippingfingers 102 out of engagement with their related hammers 'II5.Therefore, upon release of restoring bail 101 from latch I24 and fromcam II2, the active j hammers 1I5 will again be free to move underinfiuence of their respective springs to reprint the values stored inthe type members BI I.

Upon operation of the hammers 1l5, the onecycle clutch III is again"tripped in th manner previously described and the tabul'ating andreprint means will thus continue to operate, printing in each columnuntil the carriage 5 reaches its extreme left hand or some predeterminedposition, whereupon the machine-will automatically complete the mainoperating cycle, advance the platen through suitable line spacingdevices, and return the platen carriage to its initial startingposition.

Automatic carriage return means Extending transversely of the carriageis a bar I95 (Figs. 5 and 1) provided with cams I94 and I96 adapted tocontrol the action of means for returning the carriag to its initialposition.

Fixed upon shaft I99 is a forward arm 2I8.

(Fig. l) which upon rocking of shaft I99 will carry the laterallyprojecting lug of a pawl I22,

mounted upon said arm, into position below the slide II8. Following theprinting operation in the left hand position of the carriage, slide II8will act to rock the pawl I22, bringing the forward end thereof intooperative engagement with a projection I29 of lever I03, serving torestart 'the machine cycle by rocking the projection I94 of said leverout of engagement with the clutch pawl I53, whereupon the machine willcomplete the last half of its cycle of operation. As previ'ously stated,this final action serves to restore the parts to their normal positions,and bail 101 being restored, the hammers and the spring actuator 100will be restrained and the automatic repetition of the printingoperation concluded. Arm 2I8 (Fig. '1) has yieldable connection HQ witha link 220, the other end of said link being pivoted to a latch 222carried upon a plate223. Upon rocking of shaft I99, arm 2 I8, throughlink 226, will move latch 222 into the path of return movement of a pinI65 in the motor-driven arm I63, said arm having been "moved forwardlyin the first half cycle of operation of the machine. During the lasthalf cycle of operation pin I65 of arm I63 will effect rocking of plate223, which plate has a yieldable link connection 226 adapted to operatea friction clutch for effecting return of the carriage, as fullydescribedin the reference patents.

Upon movement of the platen carriage into its right hand position (lefthand in Fig. 5), a cam I96, mounted on bar I95 of the carriage, will encounter a roller I91 fast to an arm I98 secured to thesquare shaft I99,rocking shaft I99 into its original position and thereby retractinglatch 222 from the pin I65 in arm I63 and releasing the carriage returnclutch.

An insulated roller 238 (Fig. 4) mounted upon plate 223 serves to holdthe points 64 of motor switch 65 in engaged position during the carriagereturn operation.

Automatic Zine spacing Line spacing of the platen may advantageously beeffected by an impulse timed to follow the printing action, the spacingbeing delayed when repeated printing is effectecLby the interruption ofthe machine cycle. Special means may be employed for disabling the linespacing action, in normal or non-repeat printing operations, until thecarriage arrives in its left-hand position, but since this special meansis not necessary for repeat printing operations, it has not been shown.Line spacing is effected as followsz 'votally mined at 8I9 (Fig. 3) inthe framof the carriage and extending transversely thereof is a'bar 2I6(Figs. 1 and 3) normally held in raised position by means of a roller2I1 secured to an arm I19 fulcrumed in the base of the machine at I18and adapted to be operated by reciprocating movement of the cam 3I6,through link I62, arm I63, shaft I64, arm I13, lever Ill, lever I61 andarm I11. During the forward stroke of the'machine cycle,cam 3I6 willoperate the above train of parts, rocking arm I19 and roller 2I1downwardly, whereupon bar 2I6 will be free to move downwardly and allowspacing pawl M4 to rise and engage with the platen ratchet 820, throughaction of spring 880 anchored to the framing at 88I, rigid leverextension 8I8 of bar 216 (fulcrumed at 8I9) link H6 and arm 8I5. Theparts will remain in this position until the clutch is tripped tocomplete the last half of the machine cycle, whereupon the returnmovement of the parts will act to restore link 8I6 to normal position,advancing the platen and disengaging the pawl 3I4.

Accumulator setting program Patent No. 1,946,572, discloses means forautomatically readjusting the plus, minus, non-add controls of theseveral accumulators accordin to a program of successive operations.According to the disclosure of said patent the adjustments arecontrolled by a tube mounted upon the platen carriage and provided withfour rows of graded perforations, sensed by feelers related to thedifferent accumulators. Tabulation of the carriage will bring differentperforations of a given row into register with the feelers, and rotationof the tube will also bring different perforations into register.

In the present machine a program device, ad justable to change theqontrol in the last mentioned manner, would be useful, since it wouldprovide for the proper distribution, etc., of the various items amongthe accumulators. However, if the mechanism provides for a change ofcontrol in eachtabulated position of the carriage, this action should bedisabled when the machine operates to reprint.

As in Patent No. 1,946,572, a perforated tube 82 (Figs. 5 and 6) ismounted in carriage 5 and is designed to cooperate with feelers 83 inthe base of the machine in determining the angular positions ofadjustment of cams 455 (Fig. 1), fast upon the accumulator shafts 403.Cams 455 are held in contact with the cam plate M9 by the accumulatoradjusting springs, and the accumulators may be set into active positiononly when a high point of the related cam 455 lies opposite the camplate 4 I 9.

Tube 82 may be rotated, manually or otherwise, each time the carriage isreturned, to provide for proper registration of the succeeding item, thefeelers being automatically operated, to adjust the cams 455, by clutchcontrolled means operated as the carriage is located in its lefthandposition, as follows:

As the lever 26 is moved to the position indicated by dotted lines inFigure 5, in which position it will remain during the return of thecarriage, the stud 23 is ratchete'd over a trip pawl 25 (Fig. 6)pivotally mounted upon the upper arm of a latch 21, pivoted at 28 upon abracket 29.

As the carriage locates in its right hand position, and lever 20 isreturned, the stud 23 will contact trip pawl 25 and rock the latch 21against the tension of its spring 3| to free said latch from clutch 24.

During the above described movement of plate 33 an arm 59 of said platewill engage projection 60 of the lever 6| (Fig. 1) to close the contactpoints 64 of motor switch 65.

plate will contact a pin Operation of setting clutch 24 will select theregister and character of registration to be performed thereon, as fullydescribed in Patent No. 1,946,572.

Near the end of the setting cycle cam 55 fast to the driven member ofclutch 24 will engage a roller 202 of a rocker 203 fulcrumed at Mluponbracket 29 and will restore plate 33 through link connection 204.

Upon completion of the above setting cycle a machine cycle may beinitiated upon depression of operating key l38, as previously described.

As the platen carriage is shiftedfrom column to column during thereprinting operations, reciprocatory movement is given to stud 23 of thetabulating mechanism, as above described. However, the setting clutchmechanism is rendered inoperative during the above operations by meansof a projection 261 (Fig. 1) 0f the clutch operating lever I50, saidprojection in the operated position of lever I50 being adapted tooverlie a projection 266 of operating plate 33, locking said plate inits normal position.

The restraint of plate 33 by projection 26'! and the displacement of thelatch 21 during the reprint operations might prevent the relatching ofsaid plate before its release by the retraction of clutch lever I 56.Means are provided to insure that the latch will be restored and theconsequent accumulator setting action delayed until the carriage isrelocated in its right-hand position. For this purpose plate 223 iprovided with a projection 224, overlying the projection 59 of plate 33,and upon the completion of the final halfcycle of operation, the rockingof plate 223 will move plate 33 slightly in a counterclockwise directionas.viewed in Figure 6, allowing latch 2! to move into engaging position.

Total printing A total. is taken by releasing the differential actuatorlevers 6H] and allowing them to rotate the accumulators subtractivelyuntil suitable pro- J'ections on the accumulator wheels contact withzero stops mounted upon the frame. This will set the total in the 1;bars and, aimachine cycle being started, the ammers will be 'tripped toprint the total. During the return stroke of the oscillating frame 'BIGthe levers 6! are reengaged therewith and moved rearwardly to normalposition; the accumulator wheels being dis, engaged from the racksbefore the return stroke is made, whereby the register which has beentotalized will stand at zero.

The machine is set for subtractive operation by contact of the total key218 with a pin 352 (Fig. 1) of rocker control plate 326, the total keythus holding the plate free of the forward cam follower, so that rocker325 will not be operated by said follower and the accumulator will notbe disengaged at the beginning of the operation by the action of cam arm320. On the return stroke of the parts, the forward cam follower,co-acting with cam arm 326, will disengage the accumulators from thesegments. The described setting of plate 326 also disables the rear camfollower by camming it to inoperative position, whereby the accumulatorswill not be engaged during the return stroke.

Depression of the total key 213 will not only trip the column latches2l4,-through pin 263 and rocker 221, but will also trip'a latch 620through operation of a control arm 62l (Fig. 7) pivotally connected tosaid latch. Latch 620 normally engages a lug on total segment 6|8,preventing movement of said segment under the influence of the totalspring 68 l. Upon tripping of the latch, segment 618 will operate ashaft 601, having a spirally arranged row of pins 65! (Fig. 2), actingto trip the latching dogs 6l1 successively from right to left of themachine, the tripping of said dogs releasing the racks 6H] and alsoreleasing the Zero stops 6l3 so that they will fall into the path of theprojections 45'! on the accumulator wheels. The successive release ofthe differential actuator levers 6l0 by the latches 6" is essentialbecause of the character of the tens transfer mechanism associated withthe accumulator wheels, said mechanism being of the well known crawltype.

When the zeroizing operation has progressed to the left hand side of themachine, a pin 619 (Fig. l) in the rearwardly extending arm of the totalsegment 6l8 will contact with a projection of a rod I 30 connected atits other end to. a trigger l3| adapted to release latch I 48 to startthe machine. The machin being put into operation, frame 6| 6 will carrythe dogs 6" forwardly, so that they will snap under the zero stops M3and studs 659 of the actuator racks 6| 0. The hammers will now betripped to print the total and lever l6! being set to reprintpositionlthe operating cycle will be interrupted in the mannerpreviously described.

The total may be printed immediately below the several items in eachcolumn or, if preferred, it may be ofiset from the item columns. lattereiTect may be secured by adjustment of tabulatorbar I which, like theprogram Automatic paper ejection As described in Patent No. 2,081,423,the record sheet is carried in a frame 506 (Fig. 8) which is ad ustedrelative to the platen carriage proper, the two frames being connectedby links 526. A

- sheet, as fully described in the above mentioned fast upon shaft 268having suitable gear connections to the shaft 509 upon which the feedrolls'are mounted. Feeding of a record sheet into the machine will windtape 24I about drum 269. The other end of tape'24I is attached to a drumoperated by the carriage return means previously described and morefully set forth in the reference patents.

The carriage is automatically opened by operation of rods 538 pivotallyconnected to the toggles 521 at opposite sides of the machine, a bail560 being pivotally connected to the lower ends of the rods 538 andnormally held by a spring 56I in position against the rear face of orabove a bail 562, pivotally mounted in the base of the machine at 563(Fig. 7). Spring 56I has a toggle effect upon bail 560 so that as thecarriage frame is moved to closed position bail 560 will swing from arearward held position toward bail 562.

In normal or non-reprint operations, as the platen carriage is movedinto its left hand position, a cam 564 (Figs. and '7) fast to the barI95 will pass and depress a roller 565 yieldably mounted upon bail 562and will rock said bail downwardly, whereupon bail 560, under influenceof toggle spring 56 I, is moved forwardly to a position above bail 562.

During the return stroke of a machine cycle, a. roller 561, fixed uponthe driving link I6I between cam 3I6 and the driven member I55 of themain clutch, will contact a forwardly extending arm 562' of bail 562,rocking said bail upwardly. Upward movement of bail 562 will raise bail560 and rods 538, thereby straightening toggle 521 to adjust the feeddevices for paper ejection.

Straightening of toggles 521 rocks a pawl 210' out of engagement withthe ratchet teeth 21I of drum 269 and as tape 24I is tensioned in thecarriage return operation, said tape will first rotate drum 269,ejecting the'record sheet, and will thereafter act to return thecarriage to starting position.

' In the adjustment of lever IM to reprint position, however, a latchI33iFig. '7), fulcrumed at I32 and provided with a projection I34engaging the lower end of lever IOI, will be adjusted under influence ofspring I35 to bring a projection I36 thereof into the path of movementof a projection I31 of the arm 562' of bail 562. Ball 562 will thus belocked in raised position against subsequent depression of roller-565bythe came 564. Thus upon return movement of the carriage during itemreprint operations said carriage will remain in closed position, withthe toggle 521 in the bowed position illustrated in-Figure 8, and pawl210, remaining in engagement with the teeth of ratchet 21I, will preventejection of the record sheet.

During total reprint operations, however, pin SI!) of total segment 6I8,will engag an arm I43 of latch I33, moving the projection I36 of saidlatch rearwardly beyond its normal unadjusted position, where it will beengaged by an auxiliary spring latch I08, mounted upon arm 562' andextending above projection I31. Arm 562', bein free of latch I33, willbe raised by the action of cam 564 as the platen carriage moves to itsfinal total printing position, moving latch I08 out of restrainingengagement with latch I33, the latter moving forwardly into engagementwith lug I31 and resuming its latching position when arm 562' isrestored. Thus bail 562 is moved downwardly beneath bailj560 to adjustthe paper ejection upon return movement of the carriage following thefinal total reprint operation.

Negatipe totals As fully described in Patent 1,915,296, printing of atrue negative total will involve three cycles of machine operation andtwo type setting actions of segment M8, the total being printed at theend of the forward stroke of the third cycle.

Means are therefore provided, as hereinafter described, to preventinterruption of machine operation during the first two cycles inreprinting negative totals.

In taking a total amounts which have been carried up to the accumulatorwheel located to the left ofthe keyboard by the action of the tenstransfer mechanism are set up for printing by means of a two-armed leverI40 (Fig. 3) similar to the levers 6I0, but having no connection withthe keyboard. This lever I40 is normally held inactive by a latch I4I,which in total taking is tripped by a finger I42 on the shaft 601controlling the successive release of the segments. If the total isnegative, the complemental registration in the accumulators will includea 9 in the above mentioned left hand wheel, and the movement of leverI40 from 8 to 9 printing position is utilized to set the true negativetotal devices in operative position. (It may be noted that this negativetotal mechanism limits the capacity of the left hand wheel to a normalregistration of 8.)

In moving from 8 to 9 printing position lever I40 contacts with a latchplate I44 and moves said plate out of engagement with an arm I45 fast toa shaft I46 controlling the negative total devices, said shaft beingthereupon rocked by spring I41 and remaining in rocked position untilrestored during the'second cycle of machine operation in the mannerfully described in the above patent.

Rearward movement of arm I45 will also allow a spring actuated latch I59to move into engagement with. the hooked end I49 of th hammer restoringbail 101, latching said bail to prevent a printing operation of thehammers 1I5 during the first two cycles of operation.

The line spacing of platen 500 is prevented by a projection I of apivoted member I8I, having link connection I54 with an arm I fast toshaft I46, said projection in the operated position of member I 8I beingpositioned rearwardly of a downwardly projecting arm of lever I1I of theline spacing mechanism, preventing the operation of said mechanism bythe spring 880.

Fast to the negative total shaft I46 is an arm I82 (Fig 1) adapted inthe operation of said shaft to be rocked downwardly, engaging aforwardly extending arm I84 of the lever I03, restoring said lever tonormal position, thus holding the projection I04 of said lever free ofthe lateral projection of clutch pawl I53. The machine will thus be freeto operate until shaft I46 is restored, during the last half of thesecond cycle of-negative total operation, wherein arm I82 being restoredto normal, projection I04 of lever I03 will again be positioned todisengage pawl I53 during the third or printing cycle of operation.

Tripping 'of the repeat print clutch III is delayed because of therestraining of the printing hammers during the first two cycles ofoperation, spring actuator being restrained therewith.

The negative total having now been printed, the reprinting ofsaid totaland subsequent operation of the parts will be the same as describedmeans to provide for ejection ofthe record sheet 75 for normal tctal'cpr t n I claim:

1. In a motor operated adding and listing machine having cyclicoperating means including a main clutch, type differentially settable bysaid operating means during the first half of a cycle of operation andrestored-during the last half of said cycle, and spring operatedprinting hammers; means including an auxiliary clutch operable totension and release the printing hammers,

normally inactive control means operable to re-' peatedly engage theauxiliary clutch, means settable to eifect disengagement of the mainclutch in half-cycle position and to activate the control p means, andmeans timed to' operate at the conclusion of a given number ofoperations of the auxiliary clutch to reengage the main clutch.

2. In a motor operated adding and listing machine having cyclicoperating means including a main clutch, type differentially settable bysaid operating means during the first half of a cycle of operation andrestored during the last half of said cycle, spring operated printinghammers, and record tabulating means; normally inactive control meanssettable to cooperate with the printing hammers to activate thetabulating means. means including an auxiliary clutch operable totension and release the printing hammers, normally inactive controlmeans settable to cooperate with the tabulating means to engage theauxiliary clutch, means settable to effect disengagement of the mainclutch and to set the tabulating control and the auxiliary clutchcontrol means to active position, and means timed to operate in a giventabulated position of the parts to reengage the main clutch.

3. In a motor operated adding and listing machine having cyclicoperating means including a main clutch," type differentially settableby said operating means during the first half of a cycle of operationand restored during the last half of said cycle, spring'operatedprinting hammers, and special operation control means providing forpreliminary non-print cycling and a final printing cycle; normallyinactive reprint mean operable to repeatedly tension and release theprinting hammers, and means settable to effect disengagement of the mainclutch in half-cycle position and to activate the reprint means, saidsettable means including a yieldable element displaceable by the specialoperation mean to disable the setting action during the preliminarynon-print cycling.

PICKERING CROSMAN.

